linux-kernel - Re: [PATCH] riscv: Add header include guards to insn.h

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Date:   Thu, 2 Feb 2023 08:52:38 +0800
From:   "liaochang (A)" <liaochang1@...wei.com>
To:     Conor Dooley <conor.dooley@...rochip.com>
CC:     <paul.walmsley@...ive.com>, <palmer@...belt.com>,
        <aou@...s.berkeley.edu>, <heiko.stuebner@...ll.eu>,
        <ajones@...tanamicro.com>,
        <prabhakar.mahadev-lad.rj@...renesas.com>, <jszhang@...nel.org>,
        <vincent.chen@...ive.com>, <linux-riscv@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, Joe Perches <joe@...ches.com>
Subject: Re: [PATCH] riscv: Add header include guards to insn.h



在 2023/2/1 17:42, Conor Dooley 写道:
> Hi,
> 
> On Wed, Feb 01, 2023 at 05:37:24PM +0800, liaochang (A) wrote:
>> 在 2023/1/30 22:53, Conor Dooley 写道:
>>> On Sun, Jan 29, 2023 at 05:42:42PM +0800, Liao Chang wrote:
>>>> Add header include guards to insn.h to prevent repeating declaration of
>>>> any identifiers in insn.h.
>>>
>>> I'm curious, did you spot this "by hand" while doing other work, or do
>>> you have a tool that found it for you?
>>
>> I found this "by hand", inspired by scripts/checkdeclares.pl, i write a tiny tool
>> to analyse the missing header guards in header file.
> 
> Ohh, cool! I'd love to add this one to the checks on patchwork so that
> we do not end up adding any more of these. If this is based on
> checkdeclares, is it GPLv2?

Definitely, it is GPLv2,i will appending licence identifier and copyright info later.

Hi，@Joe Perches, is it ok to integrate this tool to scripts?

Thanks.

> 
> Thanks!
> 
>>
>> #!/usr/bin/env perl
>> use strict;
>>
>> sub usage {
>>         print "Usage: checkguards.pl file1.h ...\n";
>>         print "Warn of missing header guards\n";
>>         exit 1;
>> }
>>
>> if ($#ARGV < 0) {
>>         usage();
>> }
>>
>> foreach my $file (@ARGV) {
>>         open(my $f, '<', $file)
>>             or die "Cannot open $file: $!.\n";
>>
>>         my $scan_area = 1;
>>         my $guards_warn = 0;
>>
>>         # The lines of header file are divided into several areas as follows:
>>         #
>>         # ... area1 ...
>>         # #ifndef _HEADER_GUARD
>>         # ... area2 ...
>>         # #define _HEADER_GUARD
>>         # ... area3 ...
>>         # #endif /* _HEADER_GUARD */
>>         # ... area4 ...
>>         # EOF
>>         #
>>         # If any statement is found in area1, area2, and area4, it
>>         # throws a warning of illegal usage of header guard usage.
>>         while (<$f>) {
>>                 if (m/^(.*);\s*$/o) {
>>                         if ($scan_area == 1 || $scan_area == 2 || $scan_area == 4) {
>>                                 ++$guards_warn;
>>                         }
>>                 } elsif (m/^\s*(#ifndef\s+)[a-zA-Z0-9_]*_H[_]*\s*$/o) {
>>                         ++$scan_area;
>>                 } elsif (m/^\s*(#define\s+)[a-zA-Z0-9_]*_H[_]*\s*$/o) {
>>                         ++$scan_area;
>>                 } elsif (m/^\s*(#endif)\s*\/\*\s*[a-zA-Z0-9_]*_H[_]*\s*\*\/\s*$/o) {
>>                         ++$scan_area;
>>                 }
>>         }
>>
>>         close($f);
>>
>>         if ($guards_warn) {
>>                 print "Illegal usage of header guard found in $file.\n";
>>         }
>> }
>>
>> Thanks.
>>
>>>
>>>> Fixes: edde5584c7ab ("riscv: Add SW single-step support for KDB")
>>>
>>> Heh, I appreciate you going back to the file's original name to find the
>>> correct fixes tag!
>>> I figure that it's probably worth adding a fixes tag for the rename too,
>>> so that the stable bots don't get confused? That would be:
>>> Fixes: c9c1af3f186a ("RISC-V: rename parse_asm.h to insn.h")
>>>
>>> Probably overkill when you have Drew's already for something so trivial,
>>> but:
>>> Reviewed-by: Conor Dooley <conor.dooley@...rochip.com>
>>>
>>>> Signed-off-by: Liao Chang <liaochang1@...wei.com>
>>>> ---
>>>>  arch/riscv/include/asm/insn.h | 4 ++++
>>>>  1 file changed, 4 insertions(+)
>>>>
>>>> diff --git a/arch/riscv/include/asm/insn.h b/arch/riscv/include/asm/insn.h
>>>> index 25ef9c0b19e7..22c7613bfda3 100644
>>>> --- a/arch/riscv/include/asm/insn.h
>>>> +++ b/arch/riscv/include/asm/insn.h
>>>> @@ -3,6 +3,9 @@
>>>>   * Copyright (C) 2020 SiFive
>>>>   */
>>>>  
>>>> +#ifndef _ASM_RISCV_INSN_H
>>>> +#define _ASM_RISCV_INSN_H
>>>> +
>>>>  #include <linux/bits.h>
>>>>  
>>>>  #define RV_INSN_FUNCT3_MASK	GENMASK(14, 12)
>>>> @@ -365,3 +368,4 @@ static inline void riscv_insn_insert_utype_itype_imm(u32 *utype_insn, u32 *itype
>>>>  	*utype_insn |= (imm & RV_U_IMM_31_12_MASK) + ((imm & BIT(11)) << 1);
>>>>  	*itype_insn |= ((imm & RV_I_IMM_11_0_MASK) << RV_I_IMM_11_0_OPOFF);
>>>>  }
>>>> +#endif /* _ASM_RISCV_INSN_H */
>>>> -- 
>>>> 2.25.1
>>>>
>>>>
>>
>> -- 
>> BR,
>> Liao, Chang
>>

-- 
BR,
Liao, Chang